Rate ratio
Encyclopedia
A rate ratio in epidemiology
is calculated to compare the rate of events occurring at any given point in time.
Rate Ratio = Incidence Rate 1/Incidence Rate 2
Where incidence rate is the occurrence of an event over person-time, for example person-years.
Incidence Rate = Event/Person-time.
Epidemiology
Epidemiology is the study of health-event, health-characteristic, or health-determinant patterns in a population. It is the cornerstone method of public health research, and helps inform policy decisions and evidence-based medicine by identifying risk factors for disease and targets for preventive...
is calculated to compare the rate of events occurring at any given point in time.
Rate Ratio = Incidence Rate 1/Incidence Rate 2
Where incidence rate is the occurrence of an event over person-time, for example person-years.
Incidence Rate = Event/Person-time.